Here are some X sudokus, also known as diagonal sudokus. Just like as a classic sudoku, you must fill each column, row, and region with the numbers 1 to 9, but in addition, the two diagonals, the ones with gray squares, must also contain the numbers 1 to 9. This additional constraint can both help or complicate things a little. Here are three waiting for you.
1)

Puzzle :sudo_X_06451.pdf
Solution :sudo_X_06451_sol.pdf
2)

Puzzle :sudo_X_06452.pdf
Solution :sudo_X_06452_sol.pdf
3)

Puzzle :sudo_X_06453.pdf
Solution :sudo_X_06453_sol.pd
Enjoy!

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